Kia Middelburg are blame shifters

Bought a car from eastvall motors in Middelburg, car is still new. 6month old. When I bought it we installed a tracker from car track same day. 6month later the power steering has failed and now eastvaal Middelburg says it is the carvrack unit that has done this. They say the power steering is no longer under warranty because of car track. Now I must pay.